Possibly, I really think it depends
It depends on whether you see the weight loss period as long term
The weight loss period can be short term, then you move to maintenance. Both involve changes to diet and exercise, you cant maintain any loss if you just go back to what you were doing, and any change is what humans struggle with food wise.
I see it all the time on here people baulking at the word 'diet' as if its different to 'a new way of eating/sustainable change'
Yes those two things are the same, if you need to get 5 or 10 stone off, you're going to have to eat less, which ever way you do that. And then at the end of that you're going to have eat less than you did before you lost weight so you maintain the loss.
Eating less is pretty difficult because food is nice!!!
But the motivation felt when its dropping off is fantastic, then you can move around easier, everything is just easier.
I would be interested in whether there is a difference between male and female dieters in terms of sustainability because weight just bloody drops off men, they lose it quickly. And my theory is they maintain it. Women dont tend to.